The above illustration supplies generalized information for the Potomac, MD cost of living index. Compared to other cities in Maryland and cities across the country, the cost of living index in Potomac, MD is 194, which is 68% higher than the Maryland average and 94% higher than that for the entire country. The index is comprised of the following criteria: cost of retail goods and services (33%), groceries (13%), health care (5%), housing (30%), cost of public/private transportation (9%) and utilities (10%). Everyday goods and services, along with housing account for 63 percent of the total cost of living index. Goods and services that are a necessity regardless of location provide an accurate general sense of the cost of living in one city versus another. As seen above, the cost of retail goods and services in Potomac, MD are 1% higher than the average for Maryland and 8% lower than the rest of the country.